IBM Aptiva 2144, Hardware Maintenance Service

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015 (continued)
DID YOU RECEIVE THE CORRECT AUDIO RESPONSES?
Yes No
016
– Check the power supply (see “Power Supply” on page 2-26).
– If the power supply voltages are correct, replace the monitor.
– If the symptom remains, replace any optional video memory
modules installed on the system board and retest the system. If the
symptom remains, replace the system board.
017
– Do not power off the system unit to perform this step.
– Unplug the monitor I/O signal cable from the system unit.
– Refer to the following figure, and measure the monitor connector voltages
at the rear of the system unit, performing steps 1 through 4 sequentially.
1
5
1 1
1 5
6
1 0
Figure 2-10. Monitor Connector
(Step 017 continues)
1. Press 7; then press Enter and check for:
0 to
+
0.2 V dc from pin 13 to 10 (ground)
0 to
+
0.2 V dc from pin 14 to 10 (ground)
2. Press Enter; then check for:
+
3.5 to
+
4.5 V dc from pin 13 to 10 (ground)
0 to
+
0.2 V dc from pin 14 to 10 (ground)
3. Press Enter; then check for:
0 to
+
0.2 V dc from pin 13 to 10 (ground)
0 to
+
0.2 V dc from pin 14 to 10 (ground)
4. Press Enter; then check for:
+
0.5 to 1.0 V dc from pin 13 to 10 (ground)
+
3.5 to 4.5 V dc from pin 14 to 10 (ground)
Check Procedures
2-59